Answer:I think it is oxygen
Explanation:
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There are four bases in the DNA molecule: adenine, cytosine, guanine and thymine.
Smoking, sitting too long, ......................... are examples of RISK FACTORS that offset the wellness benefits of fitness program.
Fitness program has many benefits that improve one's health status, but these benefits may be hindered from manifesting if one is indulging in some habits or eating some kind of foods that are not beneficial to one's health. Such unhealthy habits and foods are termed risk factors. And these risks factors may increase the probability of one having some types of diseases in the future. <span />
Hemoglobin is a protein that carries oxygen. Hemoglobin is found in your body's red blood cells. Hemoglobin is composed of 4 subunits: two alpha and two beta. Oxygen binds to the heme prosthetic group found in each of the subunits. Typically, a fully functional hemoglobin can carry for molecules of oxygen.
